As I said in a previous post, my car was shutting off at 7300 like someone hit a kill switch. Then, it would pick up again at 4000. I thought I would run through the valves, just to check everything before I buttoned everything up. I found 3 broken polylocks on my stud girdle. They snapped about 3/8" from the bottom. I hope and pray that's it. If it is, I'm happy. I have a list a mile long of things I had to check. I think I may have tightened them a fuzz too tight.